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copied!<p>You should be able to do this with the Win32 API. Based on <a href="https://stackoverflow.com/questions/531684/what-is-the-best-way-to-take-screenshots-of-a-window-with-c-in-windows">What is the best way to take screenshots of a Window with C++ in Windows?</a>, you need to get the context of the window and then copy the image from it using <code>GetWindowDC</code> and <code>BitBlt</code> respectively.</p> <p>Looking around the Haskell Win32 API documentation, there is a <code>getWindowDC</code> function in <a href="http://hackage.haskell.org/packages/archive/Win32/2.2.2.0/doc/html/Graphics-Win32-Window.html" rel="nofollow noreferrer"><code>Graphics.Win32.Window</code></a>. This returns an <code>IO HDC</code>. There is a <code>bitblt</code> function in <a href="http://hackage.haskell.org/packages/archive/Win32/2.2.2.0/doc/html/Graphics-Win32-GDI-Graphics2D.html" rel="nofollow noreferrer"><code>Graphics.Win32.GDI.Graphics2D</code></a>. This function takes an <code>HDC</code> along with a bunch of <code>INT</code>s which presumably correspond to the arguments it takes in <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/dd183370(v=vs.85).aspx" rel="nofollow noreferrer">C++</a>.</p> <p>Unfortunately, I don't have a Windows machine handy, so I can't write the actual code. You'll have to figure out how to use the Win32 API functions yourself, which might be a bit of a bother. </p> <p>When you do, it would be great if you factored it into a library and put it up on Hackage--Windows does not usually get much love in Haskell land (as I myself show :P), so I'm sure other Windows programmers would be grateful for an easy way to take screenshots.</p>

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